nclude "myStdio.h"                                                                                                                                                   
  2 
  3 int main()
  4 {
  5     const char* s="hello world\n";
  6     FILE_* fp=fopen_("./log.txt", "w");
  7 
  8     int cnt=10;
  9     while(cnt--)
 10     {
 11         fwrite_(s, strlen(s), fp);
 12 
 13         fflush_(fp);
 14         sleep(1);
 15     }      
 16     return 0;                                                                                 
 17 } 
